PyYAML: Ticket #53: Allow for immutable subclasses of YAMLObjecthttp://www.pyyaml.org/ticket/53
<p>
YAMLObject are not directly instantiated so they don't need their own
instance attribute (i.e. an own dict). Because of that they should define
an empty <span class="underline">slots</span> and let subclasses decide whether they want arbitrary
instance attributes or not:
</p>
<pre class="wiki">--- lib/yaml/__init__.py (revision 251)
+++ lib/yaml/__init__.py (working copy)
@@ -272,6 +272,9 @@
yaml_tag = None
yaml_flow_style = None
+ # no direct instantiation, so allow for immutable subclasses
+ __slots__ = ()
+
def from_yaml(cls, loader, node):
"""
Convert a representation node to a Python object.
</pre><p>
The same is basically also true for YAMLObjectMetaclass but I doubt there
is much use for this in practice.
</p>
en-usPyYAML/static/pyyaml.pnghttp://www.pyyaml.org/ticket/53
Trac 0.12.2xiTue, 08 May 2007 20:39:39 GMTstatus changed; resolution sethttp://www.pyyaml.org/ticket/53#comment:1
http://www.pyyaml.org/ticket/53#comment:1
<ul>
<li><strong>status</strong>
changed from <em>new</em> to <em>closed</em>
</li>
<li><strong>resolution</strong>
set to <em>fixed</em>
</li>
</ul>
<p>
Makes sense to me. Applied in <a class="changeset" href="http://www.pyyaml.org/changeset/252" title="Allow for immutable subclasses of YAMLObject. Fixes #53.">[252]</a>. Thanks for the patch.
</p>
TicketRichardmnFri, 27 Jun 2014 04:53:11 GMThttp://www.pyyaml.org/ticket/53#comment:2
http://www.pyyaml.org/ticket/53#comment:2
<p>
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TicketRichardKewSun, 29 Jun 2014 18:19:45 GMThttp://www.pyyaml.org/ticket/53#comment:3
http://www.pyyaml.org/ticket/53#comment:3
<p>
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TicketRichardmnMon, 30 Jun 2014 11:06:21 GMThttp://www.pyyaml.org/ticket/53#comment:4
http://www.pyyaml.org/ticket/53#comment:4
<p>
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TicketRichardKewTue, 01 Jul 2014 04:56:06 GMThttp://www.pyyaml.org/ticket/53#comment:5
http://www.pyyaml.org/ticket/53#comment:5
<p>
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TicketRichardmnWed, 02 Jul 2014 00:08:33 GMThttp://www.pyyaml.org/ticket/53#comment:6
http://www.pyyaml.org/ticket/53#comment:6
<p>
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TicketRichardmnFri, 04 Jul 2014 10:25:28 GMThttp://www.pyyaml.org/ticket/53#comment:7
http://www.pyyaml.org/ticket/53#comment:7
<p>
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TicketRichardKewFri, 04 Jul 2014 17:39:19 GMThttp://www.pyyaml.org/ticket/53#comment:8
http://www.pyyaml.org/ticket/53#comment:8
<p>
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TicketRichardKewSat, 05 Jul 2014 04:18:02 GMThttp://www.pyyaml.org/ticket/53#comment:9
http://www.pyyaml.org/ticket/53#comment:9
<p>
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TicketRichardmnWed, 09 Jul 2014 16:50:34 GMThttp://www.pyyaml.org/ticket/53#comment:10
http://www.pyyaml.org/ticket/53#comment:10
<p>
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TicketRichardKewWed, 09 Jul 2014 21:31:39 GMThttp://www.pyyaml.org/ticket/53#comment:11
http://www.pyyaml.org/ticket/53#comment:11
<p>
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TicketRichardmnThu, 10 Jul 2014 18:45:30 GMThttp://www.pyyaml.org/ticket/53#comment:12
http://www.pyyaml.org/ticket/53#comment:12
<p>
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TicketRichardmnSat, 12 Jul 2014 10:44:29 GMThttp://www.pyyaml.org/ticket/53#comment:13
http://www.pyyaml.org/ticket/53#comment:13
<p>
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TicketRichardKewSun, 13 Jul 2014 01:24:41 GMThttp://www.pyyaml.org/ticket/53#comment:14
http://www.pyyaml.org/ticket/53#comment:14
<p>
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TicketRichardKewThu, 17 Jul 2014 06:37:49 GMThttp://www.pyyaml.org/ticket/53#comment:15
http://www.pyyaml.org/ticket/53#comment:15
<p>
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TicketRichardKewSat, 19 Jul 2014 04:25:45 GMThttp://www.pyyaml.org/ticket/53#comment:16
http://www.pyyaml.org/ticket/53#comment:16
<p>
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TicketRichardmnMon, 21 Jul 2014 17:34:21 GMThttp://www.pyyaml.org/ticket/53#comment:17
http://www.pyyaml.org/ticket/53#comment:17
<p>
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TicketFrancisOiSat, 26 Jul 2014 12:31:42 GMThttp://www.pyyaml.org/ticket/53#comment:18
http://www.pyyaml.org/ticket/53#comment:18
<p>
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</p>
Ticket